INFO: Unattend.txt Options That Are Used During an Unattended Upgrade

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During an unattended upgrade, only the following parameters in the unattend answer file are used. If NtUpgrade = yes, all other options in the answer file, if specified, are ignored.

[Unattended]
OemPreinstall = Yes
NoWaitAfterTextMode = 1
NoWaitAfterGUIMode = 1
NtUpgrade = Yes
OverwriteOemFilesOnUpgrade = Yes

[UserData]
ProductId = "xxx-xxxxxxx"

[GuiUnattended]
OemSkipWelcome = 1
				

NOTE: During an upgrade installation, if OemPreinstall is set to YES, the $OEM$ directory structure is copied to the local hard disk, but the directory structure is not used during the installation. Any options specified in a Cmdlines.txt file are ignored. Windows NT Setup recognizes and uses the $OEM$ directory structure only if NtUpgrade is set to NO in the Unattend.txt answer file. Most options commonly applied with a Cmdlines.txt file can still be applied during the unattended upgrade by specifying the winnt/winnt32 command-line switch /e. The /e switch allows Setup to run an external program at the end of GUI-mode Setup. This option can be used to apply a service pack or to start other custom applications during Setup. For additional information about the /e command-line switch, please see Chapter 5 of the Windows NT Deployment Guide.